Multiple lamp



J. GELB.

MULTIPLE LAMP. APPLICATION FILED sEPT.29. I9I7.

1,347,846, Patented July 27, 1920.

' 3 SHEETS-SHEET I. 5

,f/ JW, mon/vir J. GELB.

MULTIPLE LAMP. .APPLICATION FILED SEPT. 29. I9I7.

1,347,846. l rammed .my 27, 1920.

3 SHEETS-SHEET 2.

Egli.

1. GELB.

MULTIPLE LAMP.

APPLICATION FILED SEPT. 29, 1911.

Patented July 27, 1920.

JUSQU/4 I /NI/E/vron n., M70/NVE? UNITED STATES JOSEPH GELB, or NEW YORK, mY.

MULTIPLE LAMP.

Specification of Letters Patent. Patented July 27, 1920.

Application led September 29, 1917. Serial No. 193,884. v

To all whom t may concern:

Be it known that I, JOSEPH GELB, a sub-l ject of the Emperor of Austria, residing in the boroughv of Bronx, county of Bronx, and State of New York, have invented c ertain new and useful Improvements in Mul'- tiple Lamps, of which the following is a specification.

My present invention relates to multiple lamps designed particularly for use in the.

motion picture and photo engraving arts but also applicable to variousother Tises.

One of the objects of my invention is to provide a structure easy of manipulation for supporting light projectingA devices, in such manner that the rays of light may be easily and uickly projected in any desired direction. nother object is to provide adjustable devices whereby the intensity of light projected onany portion of a subject may be varied by causing the rays from one or more lamps to be projected thereon at varying angles. A still further object is to provide a device so constructed that it may" be moved into close juxtaposition with a camera with the lamps projecting in front of .said camera. )ther objects will be apparent from the following specification and the subjoined claims.

Referring to the drawings-l Figure 1 is a vertical central longitudinal sectional view;

Fig. 2 is a horizontal section on the line 2-2 of Fig. 1;

\Fi 3 is a detail of the swivel mounting for t e lamp;

Fig. 4 is a perspective view of a portion of one of the slidable supporting brackets;

Fig. 5 is a top plan view with parts omitted;

Fig. 6 is a Section on theline 6 6 of Fig: 1; l ig. 7 is a diagrammatic front view showing the arrangement of the pulleys, chains and counter-weights for holding the lamps at different elevations;

Fig. 8 is a detail plan view of one of the counter-weights Fig. 9 is a perspective view showing a modified form of the device;

Fig. 10 is a side elevation showing a further modification;

Fig.-11 is a perspective Vview showing a still further'modication.

12 is a crass-section of a lamp on tas line 12-12 of In the preferred embodiment of my invention shown in Figs. 1 to` 8 of the drawings the main supporting structure comprises askeleton mobile base 1 rovided with `swiveled casters 2 secured tot e under Side lof the spider arms 3 of said base.

Projecting vfrom the top of the base 1 are bosses 4--4 into which are secured upright gulde rods 5-5 for the vertically movable brackets 6 and 7. A third boss 8 supports the upright rod 9 on which counter-weights 10 and 11 are guided.

. A top plate 12 secured to the upper ends of the rods 5 and 9 is provided with downwardly depending lugs 13 for supporting the sheaves 111-14 and 15-15. Chains 16-16 pass overthe pulleys lll-14 and are conn'e'cted at their ends by S hooks 18 to the eyes 19 and 20 secured. respectivel, tothe bracket 7 and counter-weight 11. imilarly the chains 17-17 pass over the pulleys 15-15 and are connected at their ends by S hooks 21 to the eyes 22 and 23 carried by the bracket 6 and the counter-weight 10 respectively. The S hooks 18 and 21 permit of relative initial adjustment of the brackets 6 and 7.

The counter-weights 10 and 11 are so pro- -portioned that they yequal the weights respectively of the brackets 6 and 7 and the parts carried thereby, and the upper weight 10 is grooved at 10a to permit the chains 16 to pass without interference.

Springs 10 and 11 are mounted on the lower end of which is secured in a boss 28 integral with the lower cross member 25. The upper cross member 24 is provided with rearwardly extending journals 29-29 at its outer vends in which are housed grooved rollers 30-30 adapted to travel on the vertical guide rods 5 5. The lower cross member 25 is provided with similar rollers 31 which are also adapted to coact with the same guide rods. The boss 32 extending outwardly from the cross member 24'; has so cured therein an extension rod 33, the outer end of which is secured to a 4boss 34 of the goose-neck casting 35. An angularly depending boss 36 of the goose-neck has secured therein a brace rod 37, the lower end of whichl is secured in a boss 38- bf the lower cross member 25. t

Referring to Fig. 3, the lamp 39 1s provided 'with a top plate 40 to which are secured the-bolts 41 which support the operating mechanism of the lamp. The stud 42` passes through a boss 43 .of the top-plate and a similar boss 44 of the goose-neck casting and is secured by means of a nut 45 which impinges against the shoulder 46 formed on the said stud 42. The anti-friction washer 47 is interposed between the nut 45 and the boss 44 topermit the lamp \to be easily turned or swiveled onthis connection. It will be noted that the rollers of the cross member 24 are locatedat the rear of the guide bars 5, while the rollers 31 of the cross member 25 arelocatedin front thereof. With the rollers thus arranged it is obvious that the weight of the lamp 39, gooseneck 35, and parts carried thereby will tend to keep the above mentioned rollers in operative engagement with the guide bars 5. f

The construction above described permits of the whole structure being moved in close juxtaposition to a photographic camera for the reason that the width of the brackets 6 and 7 is only slightly more than the diameter lof the rods 33 -and 37 and therefore these parts may be moved right up against the side of the camera; the lamps 39 projecting in front and to one side thereof, the base 1 projecting slightly underneathl the camera and to one side thereof. The goose-neck construction on the slidable brackets 6 and 7 permits the upper lamp 39 tovbe adjusted to a greater' height than would be possible if the bracket were constructed as shown at Fig. 9. In some instances it may be desired to have one of the brackets constructed with the goose-neckvand the other without the goose-neck as shown in Fig. 10. This construction permits the lower sliding bracket to travel closerto the upper sliding bracket without causing the lower lamp to interfere with the upper lamp. A modified construction is shown in Figs. 11 and 12 in which the lamps 39 are mounted directly on the vertically moving brackets 6 and 7. This construction is useful in some classes of work but has not the great range of light adjustment or flexibility possessed by the above described constructions.

In operation the whole structure may be moved bodily by pushing same on the mobile base and thus approximately directing the light to the `point desired for thel work at hand. The brackets 6 and 7 may then 'be raised or lowered and the lamps 39turned' on their swlvelcd joints to properly focus the rays of light on the subject to be photo- I rent being conveyed to the lamps by suitable flexible conducto-rs which are looped up to the `movable brackets inf a manner gwell known in the electrical arts, the wiring being omitted from the drawings in the interest of clearness.

The invention however is not limited to the use of arc lamps as it is clear that incandescent lamps, Cooper Hewitt, or other mercury vapor lamps or even acetyleneor other gas lamps might lbe advantageously used for certain purposes. l

The supplemental reflector 50 shown in Figs. 11 and 12 is employed to increase the intensity of the light projected by the lamp.

The carbon electrodes 51 and 52 are carried in brackets 53'which are secured to the lower end of rod 54 depending from the frameof the lamps. The supplemental reflectors are made of highly polished sheet vmetal or asbestos painted to provide a good reflecting surface and they surround the rod 54. In practice itfhas beenfound that by use ofthe supplemental reflectors the intensity of light from the same lamps was observation of the trace` of the light ray indicated by broken line a, t, c. he intense light strikes the reflector at b near the carbon and is projected directly out in the direction b, c, obviously if the reflector 50 were omitted the ray would be projected in the direction a, b, and would not even strike the main reflector 55 and therefore would project in a direction out of the focus of the lamp. The trace of thelight ray indicated at lm., n, o, p illustrates how this supplemental reflector assists in 4projecting the rearward rays more efficiently.v No claim to this supplemental reflector is made in the present application.

- Though I ticularity inl detail certain specific embodiments of this invention, yet it may be understood therefrom that the invention is not restricted to the particular embodiments disclosed.' Various other modifications may be made by those skilled in the art without departing from the invention as dened in the following claims.

have described with greatpar y lamps sliding separately on said uprights,

What I claim is l 1. A multiple lamp comprising. a portable base and a plurality of uprights Connected at'their lower ends by said base, a plurality of lamps sliding separately on said uprights and separate counterbalancing means4 for said lamps for maintaining each of them independently at different elevations.

2. A multiple lamp comprising a portable base, a pair of 'uprights, a plurality of separate counterweights for saidv lamps for maintainingv'each ofv themindependently at different elevations/and an additional upright by which said counter-weights vare myname.

guided, said uprights 'being connected at their lower ends by said base and connected `also at their upper ends.

.V A multiple lamp support comprising a portable base and upright supporting means and separately vertically adjustable brack.A ets on said supporting means provided with swivel supports for'the lamps and separate counterbalancing lmeans for said brackets for maintaining each of them independently at dijerent `elevations on said supporting means. .l

In witness whereof I have hereunto slgned JOSEPH GELB. I 

